But to get the best price, certain problems need to be fixed.

In the same way, certain problems may be beyond our understanding.

Your mother had certain problems while she was pregnant with you.

Using these worms as a live food has come with certain problems over the years.

This product should not be used if you have certain medical problems.

With certain medical problems you know where to seek help.

Now, experience has shown us that there are certain problems to be considered.

I would like to draw your attention to a certain problem.

That is obviously a good idea, but I can see certain problems.

This could give rise to certain problems in the future.